Sewing machine



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Nov. l, 1927. 1,647,148

' L. ROSENMAN SEWING MACHINE Filed April 11, 1925 4 sheets-Sheet 2 wELcmEcH- y oavlcp:

|NVENTOR 7 27e@ gosen/WM BY my l wc @di ATTO R N Edg- Nov. 1,1927. M4214@ L. ROSENMAN SEWING MACHINE INVENTOR.'

ATTORNEYS.

Nov. 1 1927.

L. ROSENMAN SEWING MACHINE Filed April l1, 1923 4 Sheets-Sheet '4 ATTORNEYS .Patented Nov. 1, 1927.

, UNITED sTATEs LEO ROSENIVYIAN, OF NEWARK, NEW JERSEY, ASSIGNOR TO R. K. M. MFG. COMPANY, A.

PATENT OFFICE.

CORPORATION OF NEW JERSEY.

l SEWING MACHINE.

Application iled April 11, 1923. Serial No. 631,251.

This invention relates, generally, to improvements in sewing machines; and, the present invention has reference, more par-v ticularly, to a novel mechanism, in the forni `of an attachmentto power-driven machines,

ythe thread, or ydue to any entanglement of the` thread, or the like; the invention being especially applicable to that class of sewing machines which are used for sewing stripmembers together for the purpose of producing flies or strips for garments, to be provided with hooks and eyes.

The principal object of the present'invention, therefore, is to provide an attachment applicable to a sewing machine, which is driven by the moving sewing thread, and said attachment acting either in the manner of a centrifugal governor, or in the manner of a gyroscope, and which attachment, when a faulty or .loose stitching or other threadinterruption takes place, acting to produce an electrical circuit which automatically cuts out the motive power employed for driving the operating mechanism of the sewing machine. i l

The present invention has for its further object to provide iii connection with a sewing machine, means which is actuated by a knot 'that may be formed in the sewing thread for automatically arresting or stopping the sewing operation of the machine.

Briey :-The present invention is primarily adapted for' use with sewing machines producing what is kno-wn as the lock-stitch, such lock-stitching comprising the use of two threads, namely, the lower or bobbinthread and the upper or needle-thread, this latter thread in the resent invention being employed, as it is being fed to the needle of the sewing. machine, to actuate a spindle of tlieelectrical contact-making and breaking mechanism mentioned, and causing said mechanism to establish electrical Contact under certain-conditions of said lower and'upper threads when they are not working in unison, that is when the bobbin carrying the 'lower thread becomes empty, or when the lower thread breaks, or when the tension on the lower thread is loose, thus using less lower thread, and causing an excessive or 4greater tension upon the upper thread; or

circuit which will actuate the throw-out mechanism of the sewing machine, whereby its operation will bei arrested or stopped.

Other objects of the present invention not at this time more particularly enumerated will be clearly understood from the following detailed description of the presenty invention. v

With the various objects of the present invention in view, the said invention consists, primarily, in the novel attachments applied to a sewing machine for automatically arrecting or stopping the stitching or sewing operation of the sewing-machine, when there is a faulty or loose stitching operation, or when there are other thread-interruptions, d ue to a broken thread, or to a 'knot iii the thread, or other entanglement of the thread,

hereinafter more fully set forth, as well as in the mechanical and electrical devices cooperating therewith for producing the desired results; and the invention consists, furthermore, in the noveharrangements andbe more fully described in the following specification, and then finally embodied in the clauses of the claims which are 'appended to, and which form an essential part of the said specification.

The invention is illustrated in the accompanying drawings, in which:-

Figure l is a front elevation of a sewing machine employed in the sewing together of strips, such as are used with garment-fasteners, as hooks and eyes, and which are known in the art as garment-strips or flies, said view showing in connection therewith, ina dia mmatic manner, one embodiment of devices and parts arranged according to and embodyingvthe principles of the present invention.

p Figure 2 is another diagrammatic repre-` sentation of the varipus devices and parts in the direction of the arrow of a rotary electrical make and break device, for arresting the sewing operation of the sewing machine, said views being made on an enlarged scale. Y

Figures 5, 6, 7 and 8 are detail vlews,

made on enlarged scales, 0 certain interrupter devices, employed with the sewmg machine.

Figure 9 is a side elevation of another/ electrical make and break device, adapted to act in the manner of a yroscope, and adapted for use in lieu of te device represented in said Figures 3 and 4; Figure l() is a' horizontal sectional representation of the same,

said section being taken on line 10-10 in said Figure 9, looking in the direction vof the arrow y; artid Figure 11 is another sectional representation, taken on line 11-11 in said Figure 9, looking in the direction of the arrow a. t

Similar characters of reference are employed in all of the said above described views, to indicate corresponding parts.

Referring now to the several figures of the drawings, the reference-character 1 indicates the usual base or bench, and 2 'the main frame in which is contained the operating mechanism of the sewing machine provided with the usual driving spindle or shaft 3, the starting wheel 4, and grooved pulley 5,

` over which is passed a driving belt 6 which is actuated from a suitable source of power, for operating the mechanism of the sewing machine, and in turn actuating the reciproeating needle-holder 7 in which is secured. in the usual manner, the thread-receiving sewing needle 8. At a suit-able point upon the main frame of the sewing machine, or upon the bench upon which the machine is mounted, or in any other suitablev position, is a spool-receiving means, as 9, uponwhich is rotatably mounted, the usual spool of thread 10. Usually this means 9 is in the form ofI an upwardly extending rod or post provided at its upper extremity with an angularly extending finger or member, as 11, provided kwith* a perforation or eye 12 Y in alinement vertically The previously mentioned make and break device, which is shown more particularly in Figures 1, 2, 3 and 4 of the drawings, is indicated in general bythe reference-charac- .ter-14,v and the same is suitably mounted upon the main frame 2.0i the sewing machine. As shown, this device comprises a disc or plate 15 of insulating material provided with suitably formed tubular members or hub-portions, as 16 and 17 extending on opposite sides of the said disc or plate 15, the hub-portion 17 bein'L secured against rotary motion in a suitab y disposed hole, as 18, with which the upper portion of the said frame 2 may be provided. Suitably disposed between the said disc or plate 15 and the said frame 2, and encircling the said hub-portion 17, may be a ring or washer 19 of metal, or any other suitable material.

Suitably secured upon said disc or plate 15 by means of bolts 20, or in any other suitable manner, is a larger ring or disc 21 of metal, this disc or plate being centrally disposed upon the hub-portion 16 of the said disc or plate 15. A tubular sleeve 22 may also be arranged in the tubular portion of the said disc or plate 15 and its hubportions 16 and 17, substantially as shown in said Figure 4 of the drawings. Suitably mounted upon themain frame 2 of the sewing machine, and extending in the upward direction, at one side of the metalrdisc or plate 21 is a bracket 23 formed at its upper end-portion with a forwardly extending member 24 having a bearing-portion as 25,

portion provided by t e tubular sleeve 22.

Rotatably mounted in the bearing-porti0ns,

thus provided, is a spindle 26, upon which with the bearingy llos are suitably mounted and secured by means of pins 27, or other suitable fastening means, suitably shaped sleeves, as 28 and 29, the said sleeve '28 being preferably made in the form of a spool about which the thread 13 is wound, as at 30, and whereby, the movement of the upner or needle-thread 13, in the direction of the arrows, indicated in Figures 3 and 4 of the drawings, will produce rotation of the spindle 26 and the parts mounted thereon, as will be evident. The said spindle 26 has also suitably mounted thereon, and held in position upon said spindle 26, so as to turn with the same, a centrifugal disc 31, formed at its marginal edge with g() in a suitable position upon the upper surface of said member 24, by means of a stud 38, or

other suitable fastening means, is a plate 39 having a downwardly projecting member 40 which is provided with a perforation 41, through which the thread 13 is passed, as

is clearly evident. If desired, the previously,

-which is provided with a perforation 48,

through which the thread 13 is passed for its proper guidance to the saidgrooved wheel 45. From the said sleeve or spool 28 the thread 13 is guided in any suitable manner to the needle-holder and is inserted in the eye of the needle for the usual sewing operation.

While my present invention is applicable, to sewing machines of the various kinds, it is especially adapted for use with that class of power-driven sewing machines which are employed for variously sewing one tape or strip 49 to another tape or strip 50, for the reception of garment-fasteners, such as hooks and eyes,` to provide what is known in the trade as garment strips or flies. Thus, as is shown in Figure 1 of the drawings, the frame 2 of the sewing machine is suitably provided in the proper' place, near the sewing needle, with a tape-guide, as 51, the same comprising a suitably constructed frame 52 carrying certain guide-members 53, 54, 55

and 56, adjustably mounted upon suitable studs or pins 57 with which the said frame 52 is provided, each stud or pin being provided with a tightening nut 58 for securing said guide-members in their adjusted positions. Connected with and extending upwardly from said frame 52, are a pair of uprights, as 59 and 60, the upright 59 being provided upon its upper end with a plate 6l formed with a slot, as 62, through which the tape or strip49 is passed, and the other upright 60 being provided at its upper endportion with a suitably formed guide-roller, as 63, over which the other tape or strip 50 is passed. It will be understood, however, that in lieu of the saidguide-plate 61 and the said guide-roller 63, any other suitably constructed tape-guiding means may be employed.

Other guide-rollers, as 64, 65 and 66 may also be provided, and the tapes or strips may be passed between a pair of tension-rolls, as 67 and 68, one of which, as 67, is rotatably journalled in fixed bearings mounted in the frame 52, while the other roller 68 is rotatably journaled in spring-controlled bearings,

as 69, niovably mounted in the frame 52, so that the said roller 68 may have a resilient rotary relation to the fixed rotary position of the roller 67, as will be clearly evident.

Having in the foregoing description set forth, in combination with the mechanism of a sewing machine, diagrammatically, one general arrangement of mechanical devices used with my present invention, I will now set forth an arrangement ofelectrical circuits and certain electrical instrumentalities co-operating with said mechanical devices for completing and making certain electrical circuits whereby the operation of the machine is automatically arrested when there is a faulty or loose stitching operation of the sewing machine, or when there are other thread-interruptions, due to a knot, or a break, or an entanglement in the upper or needle-thread 13, o'r due to an empty bobbin, which ordinarily causes a slowing down of the mechanism of the machine; or when there are other interruptions adapted to be caused by an increase or decrease in the thickness of the tapes, or due to an increase or a decrease in the widths ofthe tapes owing: to a faulty folding of the marginal edge-portions of the tapes, or when the tapes, which are cut prior to being fed into the sewing machine, are either too wide or too narrow.

Referring now more particularly to Figures 1 and 2fof the drawings, the referencecharacter 7() indicates a suitable battery, or other source of electricity, with the respective end-terminals of which are connected the circuit-wires 71 and 72, the wire 71 leading to 'and being connected with a signallamp 73, or other suitable signalling device. Leading from said signalling device 7 3 is a circuit-Wire 74, which is attached to a contact-establishing device, as 75, having a leading-outwire 76 which is grounded, as at 7 7.d Connected with and leading from the wire 71 is a circuit-wire 78 which is attached to the terminal 79 of an electro-mechanical switch 80 provided with a contact-making lever 81. Connected with and leading from the terminal 82 of said device 80 isa leading-out wire 83 which is att-ached toa switchterminal 84. The reference-character 86-indicates'another switch-terminal, and 85 is a pivoted and manually operated lever, adapted when in the positions shown in said Figures l and 2 of the drawings to establish i electrical contact between the` said switchterminals 84 and 86. Connected with and leading fromsaid switch-terminal 86 is a wire 87 which is grounded, as at 88. Connected with and leading from the fixed metal disc or plate 21 of the device 14 is a circuitwire 89, whichis also grounded, as at 99, and

suitably connected with the spindle 26 is a leading-out circuit-wire 91, leading to and. electrically connected with the battery-wire 72. As shown, the iXed disc or plate 21 is also provided with upwardly extending posts 92 carrying upon their upper extremities a circular ring or plate, as 93. Under a re-' or late 93.

v tery 70, tlirougiiI ow, let us suppose that the 'sewing machine is runningat the usual proper speed, and that the upper sewing thread 13, as'it is l being fed from the spool 10 to the needle 8 presents no obstructions. When everything is runningin perfect order, the turn or loop-v portion 30 of the thread 13 acts upon the sleeve or spool 28 of the centrifugal make and break device 14 in such manner that -the rotary disc or plate 31 and the spindle It has been found in practice that when the lower or bobbin-thread and the upper or,- Ineedle-thread do not work in unison an excessive tension on the lower thread in a given time causes a greater length of the vupper thread to be used, thus increasing the rotation of the spindle 26, and that when the bobbin is emptied of the lower thread, or the lower thread becomes broken or loose, then in the given time less length of the upper thread is'used, thus decreasing'the .rotation of the spindle 26.

In the first instance, the primary result will be that the speed of the disc or plate 31 increases, so that the balls or weights will move outwardly and upwardly, being therebybrought in contact with the lower surface of the ring or late 93. A complete electric circuit is there established from the batthe wire 78, the electromechanical switch 80, the wire 83, the switch 85, the wire 87, to 'the ground 88, thence from the ground 90, through the wire 89, the disc or plate 21, the posts 92, the ring 93, the balls or wei'ght 37 and the links 36, through the disc or plate 31, the spindle 26, the wire 91, 'and the wire 72, back to the battery- 70. Immediately, upon completion of this electric circuit, the mechanism of the device 80 is actuated, so that the lever '81 is thrown in such manner as to automatically throw' out the clutch-mechanism of the sewing-m-achine, so that the sewing operation of themachine is arrested. In the second instance when there is less len h of the upper thread used the rotation o the spindle 26 decreases, thereby permitting the balls or weights to drop downwardly making coni ltact with the upper surface of the disc or A com lete electrical circuit is thus again ing of the centrifugal make' and break device, but instead the lamp 73 will be flashed on the occurrence of any of the various imperfections in the operation of the machine' heretofore' and subsequently referred to. It will be understood, however, that shouldv it be desirable to simultaneously light the signal lamp 7 3'upon occurrence of an automatic stoppage of the machine, such effect may be obtained by simply grounding the lead out wire 74 of the lamp, in which case the lamp will 'be connected in shunt ,with the control device 80, and a closing of the centrifugal make and'break device will complete the electric circuit so as to both actuate the control device 80 and light the lamp 73.

In lieu ofthe centrifugal contact-making and breaking device 14 hereinabove 'described, I may use a contact making and breaking device made in the form and acting inthe manner of a gyroscope. One form of gyroscope is indicated in Figures 9, 10 and 11 of the drawing, the same being indicated in general by the reference-character 102. A s shown, there is secured in the proper position upon the frame 2 'of the sewing machine, by means of bolts 103, or other suitable fastening means, a plate 104 of insulating material, this plate having suitably mounted thereon a bearing-member, as 105, formed in its upper surface with a depression 106, as indicated in dotted outline in Figure of the drawings. Also mounted upon said plate 104, and secured thereon by means', of bolts 103, are a pair of uprights, as 107, provided at their upper end-portions with contact-plates 108. Circuit-wires 109 lead from the said bolts 103 to the returncircuit wires 91 used in connection with the circuit-wire 72 and the negative pole of the electric battery 7 0. y

The reference-character 110 indicates a suitable ring provided with oppositely disposed bearings 111 and 112 in which is rotatably mounted a spindle 113 havin fixed thereon, so as to be rotatably dispose within the ring 110, a disc 114. Suitably secured upon the said spindle 113, so as to rotate therewith, and located upon said spindle atv a point above the said bearing 111, is a spool 115 about which the turn or looped portion 30 of the sewing thread 13 is arranged, as shown in said Figure 9 of the drawings. The lower pointed end 116 et the spindle 113 rests upon and is rotatably disposed in the depression 106 of the bearing-member 105, and the upper end-portion 117 'of the spindle extends into, and is rotatably as well as oscillatorily disposed in an arc-shaped depression 119 of a plate or member 118 which is mounted above the plate 104, and the various members of the gyroscope by means of standards or posts 120. The plate 118 is also made of insulating material; 1

Connected with andextending from the bearing 112 is the circuit-wire 89v which is grounded to the frame-work 'of the machine, as at 90, in the mannerbf the device shown in Figures 1, 2 and 3 of the drawings, and for the purposes heretofore described in connection with said iigures. e Y

VOf course it will be evident, that when the sewing machine is running at the proper speed, Athe gyroscope will operate properly, so that no electrical contact between the ring 110 and either of the contact-plates 108 is made; but when the speed of the disc 114 is such that the ring 110 moves laterally so as to contact with either of the said plates` due to the interfering causes mentioned hereinabove `in connection-with the device shown in said Figures 1. 2 and 3 of the drawings, a complete electrical circuit will be established, which actuates the heretofore mentioned electro-mechanical device 80, and

. which in turn anrests the sewing operation,

automatically, of the sewing machine.

In addition to the devices hereinbefore described, I have oscillatorily mounted upon' a support 94, secured in a suitable position upon the frame '2 of the sewing machine.

, andfsuitably insulated therefrom. a plate or element, as 95, which is provided at one endportion with a slit 9,6, or the like, said plate having its other end-portion 97 adapted to be brought into Contact with a suitably` formed leaf-spring 98, or the like, which is suitably secured at its end-portion 99 to some suitable part of theframe 2 of the sewing machine. Leading from the support 94v is a circuit wire 194, said circuit wire being connected in circuit with the circuit wire 7 2 leading in return to the electric battery 70. Connected with and leading from the end-portion 99 of the electrical contact element or spring 98 is a circuit-wire 199 which is grounded with the sewing machine, as at 200.

The upper or needle-thread 13, as will be seen from an inspection of Figures2 and 5 of the drawings, in its passage from the device 14 to the needle 8, and through the eye of the needle, also passes through the slit 96 of the pivoted plate or element 95. However, when there is a knot in the thread 13, as at 100, or another obstruction, as unravelled or loose thread-portions, when these portions, or the knot move in Contact with the marginal edges 101 which bo'und said slit 96 in th-eplate 95, the result will be that the end-portion 97 of the pivot-plate 95 will engage the free end-portion of the contact-element or spring 98. Immediately a complete electric circuit is established from the battery 70, through the wire 78, theelectric circuit. the mechanism of the device l8O is thrown in a. manner to automatically throw out the clutch-mechanism of the sewing machine, so that the sewing operation of the machine will again be arrested.

In addition, I have also provided means for automatically7 arresting the operation ot the sewing machine` when the garment fastener strips or bands 49 and 50 which are to be sewed together, vary in their width'. when either too wide or too narrow, or when varying in thickness, when either too thick or too thin.

Such means is shown more particularly in the several Figures 2, 6, 7 and 8 of the drawings.

In Figure 6 there is shown a construction of a circuit-making and breaking device 121 for establishing an electric circuit through the battery 70, the electro-mechanical device 80. the said device 121, the sewingmachine frame. and the connectingcircuitwires, when the strip or band is of greater width than desired. In'said Figure 6 I have shown the said device 121 used in connection with the wide strip 49, hut another circuitmaking and breaking device of the same construction may also be used with the narrow strip or band 50. as will be evident.

As shown in said Figure 6, the device 121 comprises a base-plate 122 of insulating material, suitably attached to the members of the previously-mentioned tape-guide, and a pairof metal elements 123 formed with the outwardly extending members 124 and 125. Connected with each member 125, but insulated therefrom. as at 126` are other members, as 127, with which the free end-portions of the members 124 are adapted to be brought in contact by the marginal edges 40v 'electric circuit is established from the batof the tape or strip'as it passes between the said members 124, when the width of the strip or tape is greater than desired. When contact is made between the members 124 and 127, a complete electric-circuit is estab- 'lished from the battery 70, through wire 7 8,

through the electro-mechanical device 80, the w1re83, the switch-lever 85. the wire 87 and ground 88 to the ground 128, see Fig. ure 6, through the wire 129, throughI the contacting members 124 andv127 of the de- Kvice 121, and out through a wire 130, consimilar in its construction to the device 121,

but acting in a reverse manner to cause an electrical circuit to be established, when the tape or strip is too narrow.

As shown in said Figure 7 the device 131 comprises a base-plate 132 of insulating material, also suitably attached to the members of the previously-mentioned tape-guide, and a pair of elements 133 formed with outwardly extending members 134 and 135. Connected with each member 135, but insulated therefrom, as at 136, are other members, as 137, with which the free end-portions of the members 134 are adapted to be broughtiu contact owing to the spring action of said members 134 toward each other, when the width ofthe passing tape or strip is less than desired. When contact is made between the membersv 134 and 137, a complete tery 70, through wire 78, through the electro-mechanical device 80, the wire 83, the switch-lever 85, the wire 87 and ground 88 tothe ground 138, see Figure 7, through the wire '139, through the contacting members 134 yandf113'' of lthe device 131, and vout through the .wire .140, connected with thev main circuit-wire 72, back to the battery 70, whereby, as soon as this electrical circuit is completed, the` electro-mechanical device is actuated',so that it -will cause the arrest or stoplping of the operation of the mechanism of e sewing machine. v

"In Figurev 8 o'f the drawin ,is shown another circuit-making and b' device, as 141, which is used asa' means for' automatically `s tnppingthe operating of the sewing machine, either the thickness of thetaeor strip is'too thick, or too thin.

ferringfnow to said Figure 8, the reference-character 142 indicates a `base-plate which is made of a suitable insulating material, said late being formedwith a, air of fo or mem 143 and 144, and the said base-plateI being adapted to be suitably attached to the members of the previously mentioned tape-guide.

Suitably secured to the arm or member 143 is a pair of inwardly extending contact meinbers, as 145v and 146, with one of which, as 145 is connected a wire 147 which is ground- Til ed with the frame of the sewing machine,

as at 148. Connected with the other cont-actmember 146 is a circuit-wire 149 which -leads to and is suitably connectedwiththe main circuit-wire 72. other arin or member 144 is another pair of inwardly extending contact-members, as 150 and 151, the free end-portions of said mem- Suitably secured to the bers 150 and 151 terminating between the said inwardly extending contact members 145 and 146, as shown. At its-free endportion, the contact-member 150 is made. v

with an outwardly curved contact making' portion 152 and with an inwardly curved Similarly, at

contact-making ortion '153. its free end-portion, the contact-member 151 is made with an outwardly curved contactf members 150 and 151 is too thick, these mem-l portion 155. The` contactberswill be forced apart, so that their out.

wardly curved portions 152 and 154 will make contact, respectively, with the members 145 and 146. A complete electric circuit is thus established from the battery 7 0, through wire 78, through the electro-mechanical device 80, the wire 83, the switch-lever 85, the

wire 87 and ground ,88 to the ground 148, f

seeFigure 8, through the wire 147, the contacting member 150, thence through the cir-l cuitfwire 156 and through the main circuitf wire 72, back vto the battery y70, whereby an electrical circuit is completed, and the electro-mechanical device is actuated, so that it will once more cause the arrest or stopping of the operation of the mechanism of the sewing machine, Similarlv, a complete electric circuit may be established.. -from `the battery 70 to the. ground 157, through the lwire 158, the contacting members 151 and 146, and thence by means lof the fwire 143, back to the battery 70. In a like manner, yif the strip or tape'is too thin, the spring-action, of -the two members 150 and 151 is such, that their inwardly extending curiied iight in f.

end-portions 153 and 155 will be bro c ontact, as will be evident, thereby estab lialiingv a complete electric circuit from the battery 70 throughwire78, thro h the deems mini g switch-lever 85, the wire 87 and ground 88 to the ground 157, see said Figure 8, through the wire 156, the contatcing members 150 and- 151and out through the wire 158, connected with the main circuit-wire 72 back to the battery, and whereby, as soon as this electrical circuit is completed, the electro-mechanical device is again actuated, so t-hat it will cause the arrest or stopping of the operation of the mechanism of the sewing machine.

As has been previously stated, the roll 68 rotates in vibratory bearings 69, the main purpose being to move the roll 68 in a dirgction awa from the roll 67 when the combined thickness of the tapes 49 and 50 is greater than the thickness desired, orto move the said roll 6 8 closer to the roll 67 when the combinedthickness of the tapes is less than that desired. Extending from the bearing-plate 69 are a pair of contact-making lingers 159 and 160, the linger 159 being adapted to move between the contactmembers 161 and 162, when the roll 68 moves away from the roll 67, and the linger 160 being adapted to move between the contact-members 163 and 164, when the roll 68 moves toward the roll 67. Leading from the member 161 is a wire 165 which is grounded, as at 166, and leading from the' member 162 is a wire 167 which is ,connectcd with the main circuit-wire 72.` Likewise, a wire 168 leads from the contact-member 168, said wire 168 being grounded, as at 169, and leading from the contact-member 164 is a wire 170 which is connected with the main circuit-wire 72.

Thus, lwhen contact is made between the `finger 159 and the members 161 and 162, a complete electrical circuit is established from lthe battery 70, through the wire 78,

through the electro-mechanical device 80, the wire 83,` the switch-lever 85, the wire 87 and ground 88 to the ground 166, vsee Figure 2, through the wire 165, the contacting members 161, 159 and 162, and through the wire 167 connected with the main circuitwire 72 back to the battery 70, whereby an electric circuit is completed, and the electromechanical device is again actuated, so that it will cause the arrest or stopping of the operation of the mechanism of the sewing machine. In a like manner, when contact is made between the linger 160 and the members 164 and 164, a complete electric circuitA is established from the battery 70, through the wire 78, through the electro-mechanical device 80, the wire 83, the switch-lever 8,5, the wire 87 and ground 88 to the ground 169,

see said Figure 2, through the wire 168, the

contacting members 163, 160 and 164, and through the wire 170 connected with the main circuit-wire 72 back to the battery 70,

`whereby an electric circuit is againccompleted, so that the electro-mechanical device strips or tapes to which are applied garment fasteners, such as hooks and eyes, it will be evident that the variousl arresting or stopping means may be employed in-conjunction with the mechanism of sewing machines employed for other sewing purposes, or with machines of a similar nature.

I am al"o fully aware, that changes may be made in the general arrangements and combinations of the various devices and parts, as well/as in the details of the construction of the said parts, without departing from the scope of the present invention,

with the sewing mechanism thereof, a rotary 'means having a spindle about which the thread passing to said sewin mechanism is wound so as to actuate sal rotary means .as set forth in the foregoing specification,

for automatically arresting the operation of the sewing mechanism as the speed of said rotary means isincreased'or decreased from a predetermined normal speed, due to a faulty or loose stitching operation.

2. In a sewing machine in combinationwith the mechanism thereof, a rotary means actuated by the sewing thread of the machine, said means automatically arresting the operation of the'mechanism of the ma-y chine as the speed of the rotary means is increased or decreased from a predetermined normal speed, due to a faulty or loose stitching operation.

In a sewing machine, the combination with the sewing mechanism thereof, of means including a rotary spindle about which the thread is wound for revolving said spindle, said means coming into operation upon the occurrence of a' faulty or loose stitching operation for automatically arresting the operation of said sewing mchanism.

4. In a sewing machine, the combination with the sewing mechanism thereof, of means including a rotary spindle about which the thread is wound for revolvingv said spindle, a disc mounted upon said spindle so as to rotate therewith, and a stopping means cooperating with said -spindle and disc, said stopping means coming into operation upon the occurrence of a faulty or loose stitching operation for automatically arresting the operation of the sewing machine.

5. In combination with a sewing machine, means for automatically arresting the operation thereof, comprising an electro-mechanical power transmission control, a source of electrical energy for actuating said control, an electric circuit connecting said source and control, and said circuit including a rotary circuit make and break device adapted.

to be actuated by the movement of thread to the stitch forming mechanism of the ma-- chine so as to remain open during movement v of said thread at normal speed but adapted as to transmit rotary motion to said spin,

dle of said centrifugal make and break means whereby the latter remains open during movement-of said thread at normal speed but closes when said movement is abnormal- 1y increased or decreased.

7. In a. sewing machine, the combination with the sewing mechanism thereof, of electrically actuated means for arresting the operation of said machine. and acentrifugal "make and break device in circuit with said arresting means. said make and break device comprising a rotaryl spindle about which the sewing thread isawound for rotating said spindle, a disc mounted on said spindle to rotate therewith. a stationarv contact means insulated from said spindle and disc, and centrifugally actuated means, carried by said disc to cooperate with said stationary contact means. i.

' 8. In a sewing machine, the combination with the sewing mechanism thereof, of elec-- trically actuated means for arresting the opel'ation of'said machine, and a centrifugal make and break device in circuit with said arresting means, said make and break de` vice comprising a rotary spindle about which the sewing thread is wound for rotating said spindle, a ldisc mounted on said spindle to rotate therewith, centrifugally actuated contact means carried by said disc, and stationarycontact means above and below said centrifugally actuated contactl means with which the latter selectively cooperate when the rotary movement of said disc is abnormally increased or decreased.

9. -In combination with a sewing machine, means for automatically arresting the operation thereof, comprising an electro-mechanical power transmission control, a source of electrical energy for actuating said control, an electric circuit connecting said source and control, and a centrifugal make and Abreak means in said circuit, comprising a rotary spindle aboutvwhich the sewing thread is wound for rotatingsaid spindle, a disc mounted on said spindle to rotate therewith, centrifugally actuated contact weights oscillatorily connected with said rotatable disc, and stationary contact means with which said contact weights may cooperate.

10. In combination with a sewing machine,

means for automatically arresting the operation thereof, comprising an electro-mechanical power .transmission control, a source of electrical energy fortactuating said control, an electric circuit connecting said source and control,` and a centrifugal make and break means in said circuit, comprising a rotary spindle about which the sewing thread is wound for rotating said spindle, a disc' mounted on said spindle torotate therewith,

centrifugally actuated contact weights oscillatorily connected with saidrotatable disc, and a stationary contact means above and below said contact weights with which the latter selectivelyv cooperate when the rotary movement of said rotatable disc is abnormally increased or decreased.

In testimony that I claim the invention set forth above I have hereunto set mv hand this 4th day of April. 1923.

LEO ROSENMAN. 

